Explanation:
Barium sulfate (BaSO₄) is used in medical imaging as a contrast agent for X-ray imaging of the alimentary canal (digestive tract). It is an insoluble, non-toxic compound that helps to highlight the esophagus, stomach, and intestines in barium swallow and barium meal procedures.
- (B) Taking X-rays of the brain → Not applicable; brain imaging is done using CT scans or MRIs.
- (C) Checking blood groups → Blood typing uses antigens and antibodies, not barium.
- (D) None of these → Incorrect, as barium is used in X-ray imaging of the digestive system.
Thus, the correct answer is (A) Taking X-rays of the alimentary canal.
Explanation by: Mr. Dubey
Barium sulfate (BaSO₄) is used in medical imaging as a contrast agent for X-ray imaging of the alimentary canal (digestive tract). It is an insoluble, non-toxic compound that helps to highlight the esophagus, stomach, and intestines in barium swallow and barium meal procedures.
- (B) Taking X-rays of the brain → Not applicable; brain imaging is done using CT scans or MRIs.
- (C) Checking blood groups → Blood typing uses antigens and antibodies, not barium.
- (D) None of these → Incorrect, as barium is used in X-ray imaging of the digestive system.
Thus, the correct answer is (A) Taking X-rays of the alimentary canal.